1Department of Neurology, Universität Heidelberg, Heidelberg, Germany
2Department of Neurology, Helsinki University Central Hospital, Helsinki
3Department of Statistics, Boehringer Ingelheim, Biberach, Germany
4Neurology Clinic, University Hospital Nitra, Nitra, Slovakia
5Department of Neurosciences, Hospital Universitari Germans Trias i Pujol, Barcelona
6Department of Neurology, Hospital of Piacenza, Piacenza, Italy
7Department of Neurology, University of Toulouse, Toulouse, France
8Faculty of Medicine, University of Glasgow, Glasgow, United Kingdom
9Boehringer Ingelheim, Reims, France
10Boehringer Ingelheim, Ingelheim, Germany
11Department of Neurology, Universität Leipzig, Leipzig, Germany
12Department of Neuroradiology, Technische Universität Dresden, Dresden, Germany
13Department of Neurology, Karolinska Institutet, Stockholm
14Department of Neurological Sciences, University La Sapienza, Rome